RevUp13b

iTrader: (12)

Will polishing the inside of the CAI pipes make the air flow smoother??? or not really?

gingenhagen

You're not going to make it any smoother than it already is.

sar

iTrader: (1)

In theory yes, a polished design will flow more than an unpolished pipe. But, it sounds like it's already a pipe, I'm assuming metal and I don't often see rough metal used on the inside or out of pipes.

If your pipe if for some reason jagged or you have something like the tornado fuel saver, then yes, polishing these out would increase flow.

SureShot

In theory - yes, but only by a very tiny amount.
A bigger factor is fewer & smoother bends.
The biggest factors are filter efficiency & pipe size.